f8 Lens Toolkit vs Leo3 Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
f8 Lens Toolkit
This app provides photographers and cinematographers with essential tools for optical calculations. It offers features like depth of field calculation, field of view determination, and lens matching for various camera formats. It's designed to be an indispensable reference tool for professionals and students alike.
- Depth of Field & Hyperfocal Distance Calculator
- Field of View Calculator
- Lens Matcher: Equivalent Focal Length & F-Stop
- Camera Sensor Comparison Tool
- Lens Coverage Tool
- Extensive camera and lens database
- Supports anamorphic shooting and Speedboosters
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f8 is the fastest and easiest tool for all photographic calculations: Effortlessly find corresponding focal lengths & apertures for different formats, calculate depth of field (DOF), and find field of view for any camera and lens. The sensor comparison and lens coverage tool make this app complete. ◈◈◈ Get professional-grade features & the most intuitive user-interface in its class ◈◈◈ No matter if you are a seasoned pro or a film/photography student, f8 has got you covered. It’s packed with the tools you need and highly customizable to deliver precise calculations for any setup imaginable. It has been proven to be an indispensable tool on any shoot. f8 comes with: • Depth of Field & Hyperfocal Distance Calculator • Field of View Calculator • Lens Matcher: Equivalent Focal Length & F-Stop • Camera Sensor Comparison Tool • Lens Coverage Tool • Thousands of cameras & lenses included • Close Focus & Aperture data for most lenses • Supports anamorphic shooting & Metabones Speedboosters f8 is the perfect companion app and reference tool for Photographers, Cinematographers, Camera Operators, Camera Assistants (1.AC) & VFX Supervisors. ◈◈◈ Download f8 now and have a precise optical toolkit at your fingertips ◈◈◈ ◆ CINE CAMERAS ◆ AJA Cion ARRI Alexa 35, Alexa 65, Alexa Classic, Alexa LF, Alexa Mini, Alexa Mini LF, Alexa SXT, Alexa XT, Amira, D-21 Blackmagic Cinema Camera, Micro Cinema Camera, Micro Studio Camera 4K, Pocket Cinema Camera, Pocket Cinema Camera 4K, Pocket Cinema Camera 6K, Pocket Cinema Camera 6K Pro, Production Camera 4K, Studio Camera 4K, Studio Camera HD, URSA, URSA (Broadcast), URSA 4.6K, URSA Mini 4.6K, URSA Mini 4K, URSA Mini Pro, URSA Mini Pro 12K, URSA Mini Pro 4.6K G2 Canon C100, C100 Mark II, C200, C300, C300 Mark II, C300 Mark III, C500, C500 Mark II, C70, C700 DJI Zenmuse X7 Film 16mm, 35mm, 65mm/70mm, 8mm Freefly Systems Wave Generic Broadcast Ikonoskop A-cam dII Kinefinity KineMAX, KineMini, Mavo, Mavo Edge, Mavo LF, TERRA Panasonic AF101, BGH1, EVA1, HDX 900, VariCam 35, VariCam LT Panavision DXL, DXL2, Genesis Phantom 65, Flex, Flex4K, HD GOLD, Miro LC321S, v2640 ONYX, VEO4K-PL PS-CAM X35 RED Dragon-X, Epic Dragon, Epic-W (Helium), Epic-X, Gemini, Komodo, Monstro-VV, One, Ranger (Gemini), Ranger (Helium), Ranger (Monstro), Raven, Scarlet-W (Dragon), Scarlet-X, Weapon (Dragon-VV), Weapon (Helium) Silicon Imaging SI-2K Sony F23, F3, F35, F5, F55, F65, F900, FS100, FS5, FS5 Mark II, FS7, FS7 Mark II, FS700, FX3, FX6, FX9, HDC-1500R, Venice Weisscam HS-2 Z CAM E2, E2-F6, E2-F8, E2-M4, E2-S6, E2G ◆ PHOTO CAMERAS ◆ Canon 1000D/XS, 100D, 10D, 1100D/T3, 1200D/T5, 1300D/T6, 1D, 1D C, 1D Mark II, 1D Mark III, 1D Mark IV, 1D X, 1D X Mark II, 1D X Mark III, 1Ds, 1Ds Mark II, 1Ds Mark III, 200D/SL2, 20D, 30D, 350D/XT, 400D/XTi, 40D, 450D/XSi, 500D/T1i, 50D, 550D/T2i, 5D, 5D Mark II, 5D Mark III, 5D Mark IV, 5DS, 600D/T3i, 60D, 650D/T4i, 6D, 6D Mark II, 700D/T5i, 70D, 750D/T6i, 760D/T6s, 77D, 7D, 7D Mark II, 800D/T7i, 80D, 850D/T8i, 90D, M50, R, R5, R6, Ra, RP Film (Still) 35mm (135), APS, Large Format, Medium Format, XPan Fujifilm GFX 100, GFX 100S, GFX 50R, GFX 50S, X-A7, X-H1, X-Pro2, X-Pro3, X-S10, X-T2, X-T200, X-T3, X-T4, X100V Hasselblad Digital Medium Format Leica CL, M10/M10-R, M8/M8.2, M9/M9-P, S, S2, SL, SL2, SL2-S Mamiya Leaf Credo Series Nikon D1, D100, D1H, D1x, D200, D2H, D2Hs, D2x, D3, D300, D3000, D300s, D3100, D3200, D3300, D3400, D3s, D3x, D4, D40, D40X, D4s, D50, D500, D5000, D5100, D5300, D5500, D5600, D60, D600, D610, D70, D700, D7000, D70s, D7100, D7200, D750, D7500, D80, D800, D810, D850, D90, DF, Z50, Z6, Z7 Olympus E Series Panasonic GH1, GH2, GH3, GH4, GH5, GH5S, S1, S1H, S1R, S5 Pentax 645D, 645Z, K Series Phase One Achromatic+, IQ Series, P 30+, P 40+, P 45+, P 65+ Sigma fp, fp L, SD1, SD15 Sony A290, A390, A450, A580, A6000, A6300, A6500, A6600, A7 III, A7C, A7r II, A7r III, A7r IV, A7s, A7s II, A7s III, A850, A9, A9 II, A900, A99, SLT-A37K, SLT-A57, SLT-A65, SLT-A77
Leo3 Smart
Capture stunning underwater photos and videos with your smartphone. This app allows manual control of camera settings, switching between photo and video modes, and even taking underwater selfies. It also features a power-saving mode and can charge your phone while diving.
- Smartphone housing pairing via Bluetooth
- Manual camera adjustments (ISO, HDR, White Balance)
- Switch between photo and video modes
- Underwater selfie mode
- Power saving mode
- Integrated charging for iPhone
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Underwater videography and photography with your Smartphone? Today you can, thanks to Leo3 Smart, the innovative Housing branded Easydive that reinvents the way to live your scuba diving and highly appreciated by snorkeling lovers as well. Download this App on your iPhone, enable Bluetooth and begin matching your Leo 3 Smart. With Easydive App you can: Match your housing Leo 3 Smart with to your Iphone This application is compatible with all Smartphone iOS. Download this App on another Iphone and ask enablement to Easydive: you can use 2 or more Smartphones with a single Leo 3 Smart housing. Use Advanced Adjusting Functions You can manually adjust the following parameters *: Time, ISO, HDR, White Balance, Automanic or Manual Focusing. Just like a real camera. And if you don't want to set all these parameters, you can use the camera in Auto Mode. * Settings can change depeding on Iphone model. Switch camera mode between photo/video with a button Simply push a button to switch between photo and video mode, and back again. Each mode has separate manual adjustments, in order to make the use of the Smartphone easier. Use the Secondary Camera (Selfies Mode) Ever considered to take underwater selfies? Leo 3 Smart allows checking the shot from your Iphone monitor. You can also record video with the secondary camera and be both director and star of your movie. Set the Power Saving Mode With one button you can set your Smartphone in power saving mode, turning off the camera and saving energy. To reactivate the App just push the Power Saving button again. Leo 3 Smart is the only underwater universal housing in the world, lifetime guaranteed up to -150 mt deep. It communicates with your Smartphone via Bluetooth connection and through the integrated control panel that allows to manage the application without using the Iphone touch screen. It has a 9000 mAh Battery Pack that allows to charge your Iphone while diving: you will never get out of the water with your Smartphone out of power. The considerable size of the Smartphone Monitor allows an incredible framing control while diving. Easydive is an Italian company founded by Fabio Benvenuti in year 2000, specialized in the production of equipments for underwater videography and photography. With this project Easydive decides to open the professionalism of its team and the quality of its products to a wider and heterogeneous public. Each diver or snorkeller can easily capture the best moments of his adventures and share them immediately using the full capabilities of his Smartphone.
Screenshots
Verdict
The clearest difference is price: Leo3 Smart at Free against f8 Lens Toolkit's $9.99. Leo3 Smart also leads on iOS requirement (12.0 vs 16.0). f8 Lens Toolkit's advantage is review sentiment (80% vs 50%) and ratings volume (26 vs 1). On rating, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Leo3 Smart is free to download; f8 Lens Toolkit costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.9 for f8 Lens Toolkit against 5.0 for Leo3 Smart. That said, the two scores are not equally well evidenced: f8 Lens Toolkit has 26 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 80% of f8 Lens Toolkit's written reviews are positive against 50% of Leo3 Smart's.
f8 Lens Toolkit ships an update every 2 months, Leo3 Smart every 3 months. The most recent releases landed on October 26, 2026 and October 19, 2026 respectively.
| Parameter | f8 Lens Toolkit | Leo3 Smart |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.9 (26 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 79.5% of reviews — better | 50.0% of reviews |
| Number of ratings | 26 — better | 1 |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Cadrage GmbH | Fabio Benvenuti |
Customer experience
f8 Lens Toolkit
Leo3 Smart
In-app purchases
f8 Lens Toolkit
No in-app purchases
Leo3 Smart
No in-app purchases









